The fact that an explosion is a physical move is implying that the explosive itself is a sentient being capable of making an actual PHYSICAL contact with the opponent... when in reality, it melts your skin off.

A move like Sand Attack or Smokescreen shouldn't affect an explosion... because it's an Explosion. If I lit a bonfire inside of one of the 9/11 planes, and it was surrounded by smoke, do you think it'd miss the Twin Towers? Probably not. (Not meant to be offensive, just to make a point)

Let me make another point. Goku's Kamehameha wave. I know it's off-topic.. but do you see Goku's Kamehameha punching people in the face? No! It explodes, and incinerates them.

...Nintendo Logic. Sorry If you WERE supporting my point, I just needed to go on a rant about the obvious flaw in logic.

I just saw your point about Explosion being Physical and not Special and citing it as "Nintendo Logic" so that reminded me of my own question I had not too long ago. It wasn't trying to support or disprove your argument in anyway~

I realize that it should be special because you aren't making direct contact with the opponent.